Vs is usually given for Maximum Takeoff Weight – the actual stall speed will be lower. Treat it as a safety margin and do not try your chances at or below Vs.

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Maximum speed (Vne, Vfe, VA, Vno)

Vne – never exceed speed. Marked with a red line on your airspeed indicator.

Vfe – maximum flap extended speed. (the end of white arc on airspeed indicator). Check your aircraft manual for information whether it concerns all flaps settings or a specific range of flaps settings. For example Vfe for Cessna 172 is 85 knots (and white arc ends there). But a safe speed for flap extension (the first notch) is 100 or 110 depending on a model. The manual can also specify additional restrictions – for example maximum flaps extended speed may be higher than maximum extension or retraction speed.

VA – design maneuvering speed. The max. speed which allows for a full deflection of control surfaces. Above this speed the G-force caused by a full deflection maneuver may cause structural damage.

Vno– maximum speed for normal operations. The end of green band on airspeed indicator. It’s also the maximum speed in turbulent air.

Climb (Vx & Vy)

Vx – best angle of flight speed. Useful when there are any obstacles on the way. Gives the best altitude gain for the distance traveled.

Vy– best rate of climb speed. The fastest way to climb to desired altitude.

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List

V…

Opis

V1

Takeoff decision speed. Takeoff can not be safely aborted beyond this speed. A multi engine plane should continue the take-off even in an event of engine failure. V1 should be calculated before departure.

V2

Takeoff safety speed. The speed which allows for a safe climb with one engine inoperable.